We don't have any right now. But when we do have such sets they sell for $200 to $400.
Their stock varies from day to day as they are essentially a contractor's thrift store. I've seen stackable units, but they're relatively rare and would probably sell fast. If you live close by, it's worth it to drop in regularly to check out what they've got. They're perfect if you've got a long term renovation project and have time to wait for the right thing to come along.
Thanks! Your answer is awaiting moderation.